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Changes in respiratory and antioxidative parameters in cucumber fruit (Cucumis sativus L.) stored under high and low oxygen concentrations.

Author(s) : SRILAONG V., TATSUMI Y.

Type of article: Article

Summary

The effects of controlled atmospheres (CA) of 5, 21 (air, control) and 100% O2 on chilling injury, respiratory and antioxidative parameters of cucumber fruits stored at 5, 10 and 20 °C were studied. The appearance of chilling injury symptoms in cucumber was delayed in both CA treatments; 100% O2 reduced pitting more effectively than the 5% O2 treatment. Respiration and ethylene production rates were suppressed in cucumber fruits stored at 5 °C to a greater extent in 100% O2 than in 5% O2 and air. At 20 °C, however, 100% O2 increased respiration to rates higher than those observed under 5 and 21% O2. The respiration rate of cucumber fruits stored at 100% O2 at 10 °C was lower than that of the control but higher than that of fruits stored at 5% O2. Fruits were analyzed for changes in enzymatic antioxidant, i.e. superoxide dismutase (SOD) and catalase, and non-enzymatic antioxidant, i.e. ascorbic acid and glutathione. In fruits stored at 5 °C, the SOD activity temporarily increased at D-1 by 5 and 100% O2 treatments; at D-5, its activities under all storage atmospheres increased. Catalase activity in the control fruit was higher than that in fruits stored under 5 and 100% O2. Glutathione concentration changed slightly from the initial level at different storage conditions. The ascorbic acid content in all storage atmospheres decreased throughout the storage period.

Details

  • Original title: Changes in respiratory and antioxidative parameters in cucumber fruit (Cucumis sativus L.) stored under high and low oxygen concentrations.
  • Record ID : 2005-0821
  • Languages: English
  • Source: J. jap. Soc. hortic. Sci. - vol. 72 - n. 6
  • Publication date: 2003

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